Haemophilus influenzae type b resistant to both chloramphenicol and ampicillin in Britain.
D000667:Ampicillin / Q000494:pharmacology*; D000818:Animals; D002701:Chloramphenicol / Q000494:pharmacology*; D006193:Haemophilus influenzae / Q000187:drug effects*; D010403:Penicillin Resistance
D002701:Chloramphenicol; D000667:Ampicillin